1 TTT NAVAJO 1 PTT DOGHOUSE 1"x1" Nal CRYSTAL © YAG39 C-22 AVERAGE FALLOUT composition ( COMPUTED ) 1 TTT 1 LTT YFNB13 E-60 4 N\ ) 1 TT \, Ds, Tm 104 FISSION activity ( COUNTS/SECOND STANDARD CLOUD O LEVI bE bE EE | 10 10° 10° AGE (HR) Figure 3.35 Photon-decay rate by doghouse counter, Shot Navajo. 108 10°